JP3116023B2 - Equipment for joining steel columns and steel beams - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel frame having a closed section such as a box column or an open section such as an H section steel, a steel beam having upper and lower flanges and a web such as an H section steel, and the like. The present invention relates to a joining device for joining the components.

[0002]

2. Description of the Related Art In general, as a joining device for a column and a beam in a steel structure, a joining hardware such as a split T and a tightening fitting such as a bolt and a nut are used. It is required to improve the accuracy and dimensional accuracy of columns / beams and their bolt holes. For this reason, a joining apparatus capable of correcting a dimensional error in building has been conventionally developed (Japanese Patent Publication No. 63-53338).

In this joining apparatus, as shown in FIG. 5, a joining metal part 51 (so-called feather plate bolt) having a flat portion 53 having a male screw bolt portion 52 formed at one end and a bolt insertion hole 55 formed at the other end. , An adjusting nut 56 is screwed into the bolt 52 of the metal joint 51, and the bolt 52 is inserted into a flange of the steel column A (H-shaped steel or the like) and tightened with a tightening nut 57. The flat plate portion 53 of 51 overlaps the flange of the steel beam B (such as a truss beam combining H-shaped steel or angle steel) and is tightened with bolts and nuts to gusset the flange of the steel column A and the web of the steel beam B. It is connected to the plate 58 by bolts and nuts.

[0004] With such a joining apparatus, even if the accuracy of setting the steel column is slightly low, the dimension can be adjusted by rotating the adjusting nut 56 screwed to the joining bolt portion 52, thereby facilitating manufacture. And workability can be improved.

[0005]

However, in the conventional joining apparatus as described above, when the steel column has an open section such as an H-section steel, a fastening nut is attached to the inside of the column flange to join the metal fittings. Can be tied to the steel column,
If the steel column has a closed cross section, such as a box column, it is not possible to put a clamping nut inside the steel column and tighten it. Also, there is a method of fixing the nut in advance inside the steel column by welding, but in order to attach the nut,
There are problems such as the necessity of cutting the joint of the steel column.

[0006] Even when the steel column has an open cross section such as an H-section steel, the operation of attaching the tightening nut to the bolt portion on the back side of the steel column and tightening it is troublesome.

The present invention has been made in order to solve such a problem, and an object thereof is to join a joint end of a steel beam to a joint of a steel column having a closed section or an open section. It is an object of the present invention to provide a steel column-to-steel beam connection device that can easily attach a metal joint from the outside of the steel column without performing special processing on the steel column.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a joining apparatus for joining an end of a steel beam to a joint of a steel column (a closed section column such as a box column or an open section column such as an H-section steel). There, the locking projection is provided at the tip of the bolt portion of the one end, a flat plate portion formed with a bolt insertion hole on the other end, the locking projection
After the female screw is formed on the bolt and screwed into the bolt,
The joint of the steel column using the joint metal with the projection fixed to the bolt (fixing the thin fixing piece of the locking projection with pliers, fixing the thin fixing piece by welding or brazing, etc.) The locking projections are inserted into the locking holes formed in the side plate (the side plate of the box column or the flange of the H-shaped steel column) from the outside of the steel frame column and rotated to lock the locking projection to the side plate, and bolts The bolt portion is fixed to the side plate by tightening a nut screwed on the outside of the steel column to the portion, the flat plate portion of the joint metal is overlapped with the beam flange and tightened with a bolt and nut, and the side plate of the steel column and the beam web are joined. It is characterized by being connected by a gusset plate or a gusset plate and a splice plate.

In the above construction, the locking projection at the tip of the bolt portion of the metal joint is inserted into the locking hole of the steel column, the metal joint itself is rotated by 90 °, and the nut located outside the steel column is tightened. By itself, the bolt portion of the joint hardware can be connected to the steel column. It is possible to attach a metal joint consisting of a flat plate part and a bolt part even on a steel column with a closed section, and for a closed section column and an open section column,
The metal joint can be easily attached to the steel column from outside the steel column without special processing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. This is an example applied to a box column having a closed cross section. 1 and 2 are an elevation view and a plan view, respectively, showing an example of a joining device for a steel column and a steel beam according to the present invention. FIG. 3 shows an example of the metal joint of the present invention. FIG. 4 shows the joining procedure of the present invention.

In FIG. 1 and FIG. 2, a steel column A is a box column made of a square steel pipe or an assembled column, and a steel beam B is H
The steel columns A and the steel beams B are composed of a truss beam or the like formed by combining a shaped steel or an angle iron, and are joined by the joint hardware 1 according to the present invention. 1 and 2 show a case where a steel beam B is attached to a steel column A from four directions and is a middle pillar, and a steel column is attached to a steel column A from three directions and a corner column is attached to a steel column A from two directions. In the case of, the configuration is the same.

The metal joint 1 comprises a male screw bolt 2, a flat plate 3 on which the bolt 2 is integrally protruded, and a nut 4 screwed to the bolt 2. Each bolt insertion hole 5 is formed, and a locking projection 6 is integrally formed at the tip of the bolt portion 2. When the metal joint 1 is manufactured, the nut 4 is screwed into the bolt portion 2 and the locking protrusion 6 is fixed to the tip of the bolt portion 2 by welding, a screw, or the like, or may be formed by forging or the like. . It is desirable that a curved portion or an inclined portion be provided at a connection portion between the bolt portion 2 and the flat plate portion 3 so that smooth stress transmission is performed. Further, the flat plate portion 3 may be formed as a single unit.

When the locking projection 6 is fixed to the tip of the bolt 2 with a screw, a female screw 6a is formed at the center of the locking projection 6 as shown in FIG. Can be screwed into. In the case of this screw type, a joining hardware 1 described later is used.
It is necessary to fix the locking projection 6 so that it does not rotate. For this reason, a thin fixing piece 6b is integrally provided on the surface of the locking protrusion 6 on the bolt tip side in proximity to the male screw of the bolt portion 2, and the locking protrusion 6 is screwed into the bolt portion 2, After determining the position in the axial direction of the bolt and making the vertical direction of the locking projection 6 coincide with the plane direction of the flat plate portion 3 as described later, the fixing piece 6b is fixed to the bolt portion 2 with pliers or the like.
And fix it. The fixing piece 6b may be formed in a ring shape or may be provided partially. Further, it may be integrally formed or attached by welding. Further, the fixing is not limited to the fixing with the fixing piece 6b, but may be performed by welding or brazing at the fixing piece position, or by screwing by pressing the tip of a screw embedded in the locking projection 6 against the male screw of the bolt portion 2. The stop projection 6 can be fixed to the bolt portion 2.

In the side plate a at the joint of the steel column A, a locking hole 7 for locking the locking projection 6 of the metal joint 1 corresponds to the position of the metal joint 1 attached to the upper and lower flanges of the steel beam B. A gusset plate 8 for joining the beam web is fixed to the middle position between the upper and lower locking projections 6 by welding. Further, when the strength of the joint of the steel column A is insufficient, the reinforcing plate 9 is attached to the outer surface of the side plate a at the joint of the steel column A.
Is fixed by welding or the like to reinforce the steel column A from the outside. As shown in FIG. 1 (a), the reinforcing plate 9 may partially reinforce only the mounting position of the metal joint 1,
As shown in (b), the entire joint may be reinforced. In this case, the locking hole 7 is also formed in the reinforcing plate 9.

The shape of the locking projection 6 is a rectangular cross section having a longer side larger than the diameter of the bolt portion 2, and the locking hole 7 is similar to the cross section of the locking projection 6 and has a slightly larger size. When the locking projection 6 is inserted into the locking hole 7 and the joint metal 1 is rotated by 90 ° around the central axis, the locking projection 6 can be locked to the side plate a. The locking hole 7 is formed vertically long in the vertical direction. In this case, when the vertical direction of the locking projection 6 is made to coincide with the plane of the flat plate portion 3 and rotated by 90 °, the flat plate portion 3 becomes horizontal. State. However, the present invention is not limited to this, and the locking hole 7 may be vertically long in the horizontal direction. In this case, the locking projection 6 and the flat plate portion 3 may be made orthogonal to each other.

In the joining apparatus having the above structure, the steel column A and the steel beam B are joined and assembled in the following procedure (see FIG. 4).

(1) The steel column A, in which the locking hole 7 is formed in advance and the gusset plate 8 and the reinforcing plate 9 are attached as necessary, is erected at a predetermined position.

(2) After the flat plate portion 3 and the locking projection 6 of the metal joint 1 are vertically set and the locking projection 6 is inserted into the locking hole 7,
Rotate to make the locking projection 6 horizontal and lock it to the side plate a. Next, it is temporarily fixed with the nut 4.

Here, when performing the dimensional adjustment to correct the dimensional error of the steel column, as shown in FIG.
A washer-shaped spacer 10 is attached to the bolt portion 2 on the flat plate portion side of the locking protrusion 6, and the position of the flat plate portion 3 is adjusted by interposing the spacer 10 between the locking protrusion 6 and the side plate a. . The spacer 10 has the same rectangular cross section as the locking projection 6.

(3) The steel beam B is suspended from the side at the joint of the steel column A, and the gusset plate 8 and the beam web are temporarily fixed (see FIG. 1), or the gusset plate 8 and the beam web are connected to the splice plate 11. (See FIG. 4).

(4) The flat plate portion 3 of the metal joint 1 is bolted to the flange of the steel beam B, and the gusset plate 8 and the beam web are fully tightened, or the gusset plate 8 and the beam web are connected via the splice plate 11. Fully tighten. Here, gusset plate 8 or splice plate 1
The one bolt hole can be formed as a circular hole when the size adjustment is not performed, and can be performed as a horizontally elongated hole if necessary. Finally, the nut 4 is tightened to complete the joining and assembly.

The mechanism for transmitting the force of the above-described joining device is as follows. That is, the shearing force from the steel beam B is transmitted to the steel column A via the gusset plate 8. Further, the bending moment of the steel beam B is transmitted to the steel column A as a pair of couples at the beam ends, and of these couples, the tensile force is transmitted to the locking projection 6 at the tip of the bolt portion via the joint hardware 1. The compression force is transmitted to the steel column A as a reaction point, and the compression force is transmitted to the steel column A using the nut 4 as a reaction point.

Although the above description has been made with reference to a steel column having a closed cross section such as a box column, the present invention is not limited to this, and the present invention can be applied to a steel column having an open cross section such as an H-beam. Needless to say.

[0024]

The steel column and steel beam joining apparatus of the present invention is as follows.
A locking projection is formed at the tip of the bolt portion of the metal joint where the flat plate portion is overlapped with the beam flange and bolted, and the locking projection is inserted into the locking hole of the steel column, and then rotated by 90 ° to lock. ,
Since it is configured to be tightened with the nut, even if the steel pillar is a closed pillar-shaped steel pillar such as a box pillar, it becomes possible to join the steel pillar and the steel beam by the joint hardware including the flat plate part and the bolt part.

In addition, the metal fittings can be easily attached to the steel column having a closed cross section or an open cross section from the outside of the steel column without specially processing the steel column, thereby facilitating production. Properties and workability can be greatly improved.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are elevation views showing an embodiment of a joining apparatus according to the present invention, and FIG. 1 (c) is a plan view and a side view showing a joining hardware.

2 (a) is a plan view of the bonding apparatus of FIG. 1, and FIG. 2 (b) is a plan view and a side view showing a dimension adjusting member of a metal joint.

3A and 3B are examples of a metal joint according to the present invention, wherein FIG. 3A is an overall front view, FIG. 3B is an overall plan view, FIG. 3C is a front view of a locking projection, and FIG. It is sectional drawing of a protrusion part.

FIG. 4 is a perspective view showing the joining and assembly of the present invention in the order of steps.

5 (a) is a plan view and FIG. 5 (b) is an elevation view showing a conventional bonding apparatus.

[Explanation of symbols]

 A: Steel column a: Side plate B: Steel beam 1 ... Joint hardware 2 ... Bolt section 3 ... Flat plate section 4 ... Nut 5 ... Bolt insertion hole 6 ... Locking projection 6a ... Female screw 6b ... Fixing piece 7 ...... Locking hole 8 Gusset plate 9 Reinforcement plate 10 Spacer 11 Splice plate

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E04B 1/24 E04B 1/58 508

Claims (1)

(57) [Claims] 1. A joining device for joining an end portion of a steel beam to a joining portion of a steel column, wherein a flattened portion provided with a locking projection at one end of a bolt portion at one end and a bolt insertion hole is formed at the other end. A female screw is formed on the locking protrusion, and a screw is formed on the bolt portion.
After joining, using a metal fitting having the locking projection fixed to the bolt portion, inserting the locking projection into the locking hole formed in the side plate at the joint of the steel column from the outside of the steel column and rotating it. The locking projection is locked to the side plate, and the bolt portion is fixed to the side plate by tightening a nut screwed on the outside of the steel column to the bolt portion. A joining device for a steel column and a steel beam, wherein the side plate of the steel column and the beam web are connected with each other.